Evolution of the ATLAS analysis model for Run-3 and prospects for HL-LHC
Evolution of the ATLAS analysis model for Run-3 and prospects for HL-LHC
复制标题
Run-3 ATLAS 分析模型的演变和 HL-LHC 的前景
作者：
J. Elmsheuser;C. Anastopoulos;J. Boyd;J. Catmore;H. Gray;A. Krasznahorkay;J. Mcfayden;C. Meyer;A. Sfyrla;J. Strandberg;K. Suruliz;T. Theveneaux
随着欧洲核子研究中心（CERN）大型强子对撞机（LHC） Run-2运行期间获得的数据量增加，即将到来的Run-3数据量更大，以及HL-LHC预计数据量将增加一个数量级以上，ATLAS实验在磁盘存储资源方面达到了当前数据生产模型的极限。改进的快速模拟的预期可用性将使ATLAS能够使用可用的CPU生成更大的蒙特卡罗样本，而CPU随后将受到磁盘资源不足的限制。Run-2结束时建立Run-3的ATLAS分析模型研究组。其任务是分析当前分析模型的效率和适用性，并提出重大改进建议。该小组已经考虑了允许ATLAS为相同的数据样本和模拟事件节省至少30%的磁盘空间的选项，并就如何为HL-LHC实现更大的节省提出了建议。此外，还提出了一些建议，以协调整个合作的当前分析阶段。该小组现在已经完成了它的工作：主要的建议将是新的小型分析格式daod_phy和DAOD_PHYSLITE，以及在这些格式的集中生产中增加磁带轮带模式的使用。本文综述了Run-3推荐的ATLAS分析模型及其实施情况。并对HL-LHC分析进行了展望。
With an increased dataset obtained during the Run-2 of the LHC at CERN, the even larger forthcoming Run-3 data and the expected increase of the dataset by more than one order of magnitude for the HL-LHC, the ATLAS experiment is reaching the limits of the current data production model in terms of disk storage resources. The anticipated availability of an improved fast simulation will enable ATLAS to produce significantly larger Monte Carlo samples with the available CPU, which will then be limited by insufficient disk resources. The ATLAS Analysis Model Study Group for Run-3 was setup at the end of Run-2. Its tasks have been to analyse the efficiency and suitability of the current analysis model and to propose significant improvements. The group has considered options allowing ATLAS to save, for the same sample of data and simulated events, at least 30% disk space overall, and has given recommendations on how significantly larger savings could be realised for the HL-LHC. Furthermore, suggestions were made to harmonise the current stage of analysis across the collaboration. The group has now completed its work: key recommendations will be the new small sized analysis formats DAOD_PHYS and DAOD_PHYSLITE and the increased usage of a tape carousel mode in the centralised production of these formats. This proceeding reviews the recommended ATLAS analysis model for Run-3 and the status of its implementation. It also provides an outlook to the HL-LHC analysis.